Fagaceae, Dumortier, 1829

van Nieukerken, Erik, Laštůvka, Aleš & Laštůvka, Zdeněk, 2010, Western Palaearctic Ectoedemia (Zimmermannia) Hering and Ectoedemia Busck s. str. (Lepidoptera: Nepticulidae): five new species and new data on distribution, hostplants and recognition, ZooKeys 32 (32), pp. 1-82 : 19-20

Key to males of Fagaceae feeding species

The keys of the previous revision (Van Nieukerken 1985) can still be used to identify most Ectoedemia (s.s.) species, since most additions are in the Fagaceae feeders, we provide here a new key to males for that group. Th is key works best for freshly collected or reared males; worn specimens may be diffi cult to identify without dissection. For checking hairpencils the forewing needs to be slightly lifted.

Since females are much harder to identify by external characters, we do not provide a key for those. When no males are present, often the genitalia need to be dissected.

1. Forewing without colour pattern, irrorate brown or ochreous. Hindwing without hairpencil, but with costal bristles................................................. 2

– Forewing with distinct pale spots or fascia. Hindwing either with hairpencil or costal bristles ....................................................................................... 4

2. Ground colour white, with scattered brown to black scales. Hindwing with dark fuscous or black hairpencil.......................................... E. gilvipennella

– Ground colour brown or ochreous, mixed with pale yellowish white scales. Hairpencil absent, costal bristles present .................................................... 3

3. Antenna with 28–37 segments. Occurs in Quercus pubescens stands in southern half of Europe................................................................ E. rufifrontella

– Antenna with 36–44 segments. Occurs on evergreen Quercus in eastern Mediterranean (Fig. 73) ................................................................... E. alnifoliae

4. Forewing with pale dorsal spot only, no other pattern ................................ 5

– Forewing with additional pale marking(s) on costa .................................... 7

5. Hindwing upperside and forewing underside with patch of brown androconial scales ................................................................................. E. heringella

– No androconial scales present .................................................................... 6

6. Genitalia: gnathos undivided, serrate margin (Fig. 82). Species of SW Europe ................................................................................................. E. ilicis

– Genitalia: gnathos divided, basal part with serrate margin (Fig. 83). Species of Greece and Turkey.......................................................... E. pseudoilicis

7. Forewing with fascia or opposite costal and dorsal spot only ...................... 8

– Forewing with additional spots, either a discal spot beyond middle, or a basal spot or streak connected to fascia ............................................................. 16

8. Hindwing with distinct hairpencil. Fascia usually unbroken....................... 9

– Hindwing without hairpencil, with costal bristles. Usually separate costal and dorsal spots, often costal spot closer to wing base ................................... 14

9. Small species (wingspan 4.0–4.2 mm) of Eastern Mediterranean, brown androconial scales on hindwing, antennae with 35–36 segments (Fig. 44) ....... ........................................................................................... E. aegilopidella

– Larger species, wingspan 4.8 mm or much larger. Occur in western Europe, east to Sardinia and Sicily. Antennae with 36–60 segments ...................... 10

10. Hairpencil white. Hindwing with white androconial scales, reaching one third of hindwing. Antenna with 49–60 segments. Flying from (July) August to October (Fig. 33, 34)................................................................ E. suberis

– Hairpencil ochreous or brown. Androconial scales white or brown. Antennae with 36–57 segments. Flying from April onwards .................................... 11

11. Hindwing covered with white androconial scales only.............................. 12

– Hindwing covered with brown and sometimes some white androconial scales........................................................................................................ 13